CN219590486U

CN219590486U - LED tester

Info

Publication number: CN219590486U
Application number: CN202320234013.XU
Authority: CN
Inventors: 陈元广; 李向前; 姚亚平; 许润华; 王洁城
Original assignee: Zhongshan Chunqiao Electronic Technology Co ltd
Current assignee: Zhongshan Chunqiao Electronic Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-08-25
Anticipated expiration: 2033-02-16

Abstract

The utility model discloses an LED tester, which comprises a main control module U1, wherein the input end of the main control module U1 is connected with a ammeter head J3, a learning key S2 and a testing key S1, and the output end is connected with an indicator lamp module and a voice alarm module; the master control module U1 is connected with a power supply and recording program interface JP1, the utility model is provided with a learning key S2, the ammeter head J3 can measure the LED current on the standard sample plate, the data is transmitted to the master control module U1 through the ammeter head J3, the master control module U1 learns the data, and the utility model can accurately judge the quality of the LEDs when detecting different circuit boards, thereby improving the working efficiency and accuracy.

Description

LED tester

Technical Field

The utility model relates to an electric tester, in particular to an LED tester.

Background

In the prior art, when testing LEDs on a circuit board, the standard circuit board and the test circuit board are electrified, and the LED is compared and judged by manually visually inspecting the luminous condition of the LEDs; in addition, the advanced instrument performs a test on each LED in a scanning manner, and the luminous condition of the LEDs is visually detected by manpower, so that various circuit boards exist in practice, and the eyes of a person can be tired for a long time, thus being easy to judge errors.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the LED tester with a learning function for automatically identifying whether the LED is qualified or not.

The technical scheme adopted for solving the technical problems is as follows:

the LED tester comprises a main control module U1, wherein the input end of the main control module U1 is connected with a ammeter head J3, a learning key S2 and a testing key S1, and the output end of the main control module U1 is connected with an indicator lamp module and a voice alarm module; the main control module U1 is connected with a power supply and recording program interface JP1.

The indicator light module comprises a test indicator light LED1, a learning indicator light LED2, a qualified indicator light LED3 and a disqualified indicator light LED4.

The main control module U1 is a SCM of SC92F series.

The model of the main control module U1 is SC92F8483.

The 13 th pin of the main control module U1, a resistor R5, a resistor R6, a triode Q1, a current-limiting diode D1 and a relay K1 form a test power supply control circuit; the 13 pins of the main control module U1 are connected with the base electrode of the triode Q1 through a resistor R5, the emitting electrode of the triode Q1 is grounded, the base electrode of the triode Q1 is connected with an emitting electrode connecting resistor R6, the 1 st pin of the relay K1 is connected with an external power supply VDD, the 5 th pin of the relay K1 is connected with the collecting electrode of the triode Q1, the 1 st pin of the relay K1 is connected with the 5 th pin of the current limiting diode D1, the positive electrode of the current limiting diode D1 is connected with the 1 st pin of the relay K1, and the negative electrode of the current limiting diode D1 is connected with the 5 th pin of the relay K1.

The 7 th pin and the 8 th pin of the ammeter head J3 are respectively connected with the 7 th pin and the 8 th pin of the main control module U1; the 1 st pin of the ammeter head J3 is a negative electrode and is connected with the 2 nd pin of the binding post J1, the 2 nd pin of the ammeter head J3 is a positive electrode and is connected with the 4 th pin of the relay K1; the 2 nd pin of power supply interface J2 connects terminal J1's 1 st pin, and the 2 nd pin of relay K1 is connected to power supply interface J2's 1 st pin, the 5 th pin of ampere meter head J3 connects the external power supply VDD of power supply and input program interface JP1, and the 6 th pin ground connection.

The external power supply VDD of the power supply and input program interface JP1 is connected with a 1 st pin of the main control module U1, a 3 rd pin of the main control module U1 is grounded, and a capacitor C1 is connected between the 1 st pin and the 3 rd pin; the RX pin of the power supply and recording program interface JP1 is connected with the 7 th pin of the main control module U1, and the TX pin is connected with the 8 th pin of the main control module U1.

One end of the test indicator light LED1 is connected with a 28 th pin of the main control module U1 through a resistor R1, and the other end of the test indicator light LED is grounded; one end of the learning indicator lamp LED2 is connected with a 27 th pin of the main control module U1 through a resistor R2, and the other end of the learning indicator lamp LED is grounded; one end of the qualified indicator light LED3 is connected with a 26 th pin of the main control module U1 through a resistor R3, and the other end of the qualified indicator light LED is grounded; one end of the disqualified indicator light LED4 is connected with the 25 th pin of the main control module U1 through a resistor R4, and the other end of the disqualified indicator light LED is grounded.

The voice alarm module comprises a triode Q2 and a buzzer LS1, one end of the buzzer LS1 is connected with an external power supply VDD, the other end of the buzzer LS1 is connected with a collector electrode of the triode Q2, an emitter electrode of the triode Q2 is grounded, a base electrode is connected with a 25 th pin of the main control module U1 through a resistor R7, and a resistor R8 is connected between the base electrode and the emitter electrode of the triode Q2.

The beneficial effects of the utility model are as follows: the utility model has the study key S2, the ammeter head J3 can measure the LED current on the standard sample plate, the data is transmitted to the main control module U1 through the ammeter head J3, the main control module U1 learns the data, and the LED quality can be accurately judged when different circuit boards are detected, so that the working efficiency and the working accuracy are improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a circuit diagram of the present utility model.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

It is to be understood that this description is merely exemplary in nature and is not intended to limit the scope of the present utility model.

Referring to fig. 1, an LED tester comprises a main control module U1, wherein the input end of the main control module U1 is connected with a ammeter head J3, a learning key S2 and a testing key S1, and the output end is connected with an indicator lamp module and a voice alarm module; the main control module U1 is connected with a power supply and recording program interface JP1. The power supply and recording program interface JP1 is a standard USB interface, the USB interface is provided with two power lines and two data lines, the external power supply VDD in FIG. 1 is the power positive electrode of the USB interface, and GND (ground) is the power negative electrode of the USB interface. The power and entry program interface JP1 also serves as an upgrade test program interface.

The master control module U1 is a single-chip microcomputer of SC92F series, and in this embodiment, a single-chip microcomputer with a model number of SC92F8483 is taken as an example for illustration.

The 13 th pin of the main control module U1, a resistor R5, a resistor R6, a triode Q1, a current-limiting diode D1 and a relay K1 form a test power supply control circuit; the 13 pins of the main control module U1 are connected with the base electrode of the triode Q1 through a resistor R5, the emitting electrode of the triode Q1 is grounded, the base electrode of the triode Q1 is connected with an emitting electrode connecting resistor R6, the 1 st pin of the relay K1 is connected with an external power supply VDD, the 5 th pin of the relay K1 is connected with the collecting electrode of the triode Q1, the 1 st pin of the relay K1 is connected with the 5 th pin of the current limiting diode D1, the positive electrode of the current limiting diode D1 is connected with the 1 st pin of the relay K1, and the negative electrode of the current limiting diode D1 is connected with the 5 th pin of the relay K1. The current limiting diode D1 prevents static electricity of the external power supply VDD from damaging the transistor Q1.

The 7 th pin and the 8 th pin of the ammeter head J3 are respectively connected with the 7 th pin and the 8 th pin of the main control module U1; the 1 st pin of the ammeter head J3 is a negative electrode and is connected with the 2 nd pin of the binding post J1, and the 2 nd pin of the ammeter head J3 is a 4 th pin of the positive electrode connecting relay K1; the 2 nd pin of power supply interface J2 connects terminal J1's 1 st pin, and the 2 nd pin of relay K1 is connected to power supply interface J2's 1 st pin, the 5 th pin of ampere meter head J3 connects the external power supply VDD of power supply and input program interface JP1, and the 6 th pin ground connection.

The external power supply VDD of the power supply and input program interface JP1 is connected with a 1 st pin of the main control module U1, a 3 rd pin of the main control module U1 is grounded, and a capacitor C1 is connected between the 1 st pin and the 3 rd pin; an RX pin of the power supply and recording program interface JP1 is connected with a 7 th pin of the main control module U1, and a TX pin is connected with an 8 th pin of the main control module U1; the capacitor C1 is a filter capacitor. The power supply and recording program interface JP1 can carry out program upgrading on the main control module U1 through the TX and RX interfaces, and the ammeter head J3 can transmit data to the main control module U1 through the TX and RX interfaces.

One end of the test indicator light LED1 is connected with a 28 th pin of the main control module U1 through a resistor R1, and the other end of the test indicator light LED is grounded; one end of the learning indicator lamp LED2 is connected with a 27 th pin of the main control module U1 through a resistor R2, and the other end of the learning indicator lamp LED is grounded; one end of the qualified indicator light LED3 is connected with a 26 th pin of the main control module U1 through a resistor R3, and the other end of the qualified indicator light LED is grounded; one end of the disqualified indicator light LED4 is connected with the 25 th pin of the main control module U1 through a resistor R4, and the other end of the disqualified indicator light LED is grounded. When the corresponding pin of the main control module U1 outputs a high level, the corresponding indicator lamp is lightened.

The voice alarm module comprises a triode Q2 and a buzzer LS1, one end of the buzzer LS1 is connected with an external power supply VDD, the other end of the buzzer LS1 is connected with a collector electrode of the triode Q2, an emitter electrode of the triode Q2 is grounded, a base electrode is connected with a 25 th pin of the main control module U1 through a resistor R7, and a resistor R8 is connected between the base electrode and the emitter electrode of the triode Q2. The 25 th pin of the main control module U1 outputs high level, and when the disqualified indicator lamp LED4 is lightened, the triode Q1 conducts the buzzer LS1 to sound and give an alarm.

The power supply interface J2 is used for providing voltage for a test product, the test product is connected to the binding post J1, and the power supply interface J2 is used for adjusting the voltage.

The ampere meter head J3 uses a TDM20X1 series direct current ampere meter, and in the embodiment, the direct current ampere meter with the model number of TDM2001-200mA-S is taken as an example for illustration; the test precision of the ammeter head J3 can reach 0.05%, and the ammeter head J3 can communicate data with a main control module through serial ports.

Before testing, a standard circuit board to be tested is required to be studied, namely the standard circuit board is connected to a binding post J1, the voltage of a power supply interface J2 is regulated, then a study key S2 is pressed, a study indicator lamp LED2 is lightened, a main control module U1 outputs a control signal to enable a relay K1 to be powered on, pins K1 and 4 are conducted, the current of the LED of the standard circuit board is measured by a current meter J3, data are obtained and transmitted to TX and RX pins of the main control module U1 from TX and RX pins of the current meter J3, and the standard data are obtained and stored by the main control module. During testing, the test circuit board is connected to the wire column J1, the voltage of the power supply interface J2 is regulated, the test key S1 is pressed, the test indicator lamp LED1 is lightened, the main control module U1 obtains test data in the same mode, the main control module U1 compares the test data with standard data, then the test result is output, if the test is normal, the qualified indicator lamp LED3 is lightened (green light), if abnormal, the unqualified indicator lamp LED4 is lightened (red light), the buzzer LS1 sounds to give an alarm, if the lamp bead or the component is short-circuited, broken or damaged, the current of a tested product can be changed, whether the product is qualified is determined by comparing the test data with the current of the standard board, the measured data has tolerance, and the tolerance range is considered to be qualified within plus or minus 5 percent of the standard data. The utility model has the study key S2, the ammeter head J3 can measure the LED current on the standard sample plate, the data is transmitted to the main control module U1 through the ammeter head J3, the main control module U1 learns the data, and the LED quality can be accurately judged when different circuit boards are detected, so that the working efficiency and the working accuracy are improved.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood that when an element is referred to as being "mounted," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. The LED tester is characterized by comprising a main control module U1, wherein the input end of the main control module U1 is connected with a ammeter head J3, a learning key S2 and a testing key S1, and the output end of the main control module U1 is connected with an indicator lamp module and a voice alarm module; the main control module U1 is connected with a power supply and recording program interface JP1.

2. The LED tester of claim 1, wherein the indicator light module comprises a test indicator light LED1, a learning indicator light LED2, a pass indicator light LED3, a fail indicator light LED4.

3. The LED tester according to claim 2, wherein the main control module U1 is a single chip microcomputer of SC92F series.

4. The LED tester of claim 3, wherein the master control module U1 is model number SC92F8483.

5. The LED tester according to claim 4, wherein the 13 th pin of the main control module U1, the resistor R5, the resistor R6, the triode Q1, the current-limiting diode D1 and the relay K1 form a test power supply control circuit; the utility model discloses a high-voltage power supply, including main control module U1, relay K1, current limiting diode D1, relay K1, external power supply VDD, relay K1's 5 th pin, relay K1's 1 st pin and 5 th pin are connected current limiting diode D1, current limiting diode D1 positive pole is connected relay K1's 1 st pin, the negative pole is connected relay K1's 5 th pin, main control module U1's 13 pins pass through resistance R5 and connect triode Q1 base, triode Q1's projecting pole ground connection, triode Q1's base and projecting pole connecting resistance R6, relay K1's 1 st pin is connected external power supply VDD, relay K1's 5 th pin is connected triode Q1's collecting electrode.

6. The LED tester according to claim 4, wherein the 7 th and 8 th pins of the ammeter head J3 are respectively connected with the 7 th and 8 th pins of the main control module U1; the 1 st pin of the ammeter head J3 is a negative electrode and is connected with the 2 nd pin of the binding post J1, the 2 nd pin of the ammeter head J3 is a positive electrode and is connected with the 4 th pin of the relay K1; the 2 nd pin of power supply interface J2 connects terminal J1's 1 st pin, and the 2 nd pin of relay K1 is connected to power supply interface J2's 1 st pin, the 5 th pin of ampere meter head J3 connects the external power supply VDD of power supply and input program interface JP1, and the 6 th pin ground connection.

7. The LED tester according to claim 4, wherein the external power supply VDD of the power supply and input program interface JP1 is connected with a 1 st pin of the main control module U1, a 3 rd pin of the main control module U1 is grounded, and a capacitor C1 is connected between the 1 st pin and the 3 rd pin; the RX pin of the power supply and recording program interface JP1 is connected with the 7 th pin of the main control module U1, and the TX pin is connected with the 8 th pin of the main control module U1.

8. The LED tester according to claim 4, wherein one end of the test indicator light LED1 is connected to the 28 th pin of the main control module U1 through a resistor R1, and the other end is grounded; one end of the learning indicator lamp LED2 is connected with a 27 th pin of the main control module U1 through a resistor R2, and the other end of the learning indicator lamp LED is grounded; one end of the qualified indicator light LED3 is connected with a 26 th pin of the main control module U1 through a resistor R3, and the other end of the qualified indicator light LED is grounded; one end of the disqualified indicator light LED4 is connected with the 25 th pin of the main control module U1 through a resistor R4, and the other end of the disqualified indicator light LED is grounded.

9. The LED tester according to claim 8, wherein the voice alarm module comprises a transistor Q2 and a buzzer LS1, one end of the buzzer LS1 is connected to an external power supply VDD, the other end is connected to a collector of the transistor Q2, an emitter of the transistor Q2 is grounded, a base is connected to a 25 th pin of the main control module U1 through a resistor R7, and a resistor R8 is connected between the base and the emitter of the transistor Q2.